Feed attachment for wood-pulp chippers.



No. 642,957. Patented Feb. 6, I900.

S. W. BUTTEBHELD.

FEED ATTACHMENT FOR WOOD PULP CHIPPERS.

(Application filed Sept. 12, 1899.)

2 Sheets-Sheet I.

(No Model.)

WITNESSES lNVENTOI'? w: mails PETERS cm. PHDYO-LITNO. wAsmNC-rou. D. c

\ No 642,957. Patontad Feb. 6, I900.

S. W. BUTTERFIELD.

FEED ATTACHMENT FOR WOOD PULP CHIPPEBS.

(Application filed Sept. 12, 1899.) (No Model.) 2 Sheets-Sheet 2,

W/ TNE SSE S I N VE N 70/? I A 770/?NEYS w: "cams ravens co, PMQTQLWHQ, msmnmum u c.

NrTsD STATES PATENT Trice.

SAMUEL IV. BUTTERFIELD, OF THREE RIVERS, CANADA.

SPECIFICATION formingpart of Letters Patent NO. 642,957, dated February 6, 1900.

Application filed September 12,1899. Serial No. 730,202. (No model.)

T0 at whom it may concern.-

Be it known that I, SAMUEL TV. BUTTER- FIELD, a citizen of the United States, residing at Three Rivers, in the Province of Quebec and Dominion of Canada, have invented a new and Improved Feed Attachment forPulp- \Vood Chippers, of which the following is a full, clear, and exact description.

The invention relates to machines for reducing timber to chips, which are to be transformed by the aid of chemicals into woodpulp.

The object of the invention is to providea new and improved feed attachment for pulpwood chippers for feeding timber to a revolving knife-wheel, for the knives thereof to cut chips of uniform thickness, which is essential to a proper disintegration when the chips are subjected to the action of the chemicals to insure the production of a high grade of wood-pulp.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of my invention is represented in the accompanying drawings,

forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the views.

Figure 1 is a plan view of the improvement as applied, and Fig. 2 is a sectional side elevation of the same.

The pulp-wood chipper of any approved construction is provided with the usual revoluble chipper-head A, carrying on its front a plurality of radially-disposed knives projecting from the face a desired distance to cut chips of a desired thickness. The cutterhead A is secured on a shaft B, journaled in suit-able bearings on the frame of the chipper, and on said shaft is secured a pulley C, connected by belt with other machinery for imparting the necessary motion to the shaft 13 and the chipper-head A. The timber is fed lengthwise to the front face of the chipperhead A and to the knives thereof down an inclined feed-table D, in which is formed a transverse opening D, through which extends the peripheral face of a driven feed roller E, having its shaft E journaled in suitable bearings on the framework of the chipper, as is plainly illustrated in the drawings. Thus the timber passing down the feed-table is fed downward by coming in contact with the feed-roller E, rotating in the direction of,

the arrow a. The top of the timber is engaged by a second feed-roller F, rotating in the direction of the arrow 7), the contact of the peripheral face of this roller F with the timber being somewhat in advance of the contact of the roller E with the under side of the timber. The two rollers E and F are preferably grooved or corrugated transversely, as is plainlyindicatedin Fig. 2, to insure a proper gripping and feeding of the peripheral faces of the rollers on the timber.

The shaft F of the roller F is journaled in arms G, fulcrumed loosely on a shaft H, runnin g parallel to the shaft E and geared thereto by gear-wheels I I, in mesh with each other, asindicated in Fig. 1. On the shaft H, alongside one of the arms G, is secured a sprocket wheel J, connected by a sprocket-chain J with a sprocket-wheel J 2 on the shaft F, so that when the shaft H is rotated a positive rotary motion is transmitted to the roller F in the direction of the arrow 11 by the sprocketwheels J J 2 and the sprocket-chain J.

A rotary motion is given to the shaft E from the cutter-head shaft B, and for this purpose one end of the shaft E is provided with a bevel gear-wheel K, in mesh with a bevelpinion K, secured on a shaft L,journaled in suitable bearings on the framework of the chipper. On the shaft L is secured a pulley N, connected by a belt N with a pulley N on the cutter-head shaft B, so that when the latter is rotated a rotary motion is given to the shaft L, and the motion of the latter is transmitted by the bevel-pinion K and gear-wheel K to the shaft E to positively rotate the roller E, and as the shaft E is connected by the meshing gear-wheels I I with the shaft H the latter is also rotated to drive the roller F by the sprocket-wheels J J 2 and sprocketchain J, as above mentioned. By hanging the roller F on the loosely-swinging arms G it is evident that the said roller can readily accommodate itself to different thicknesses of timber.

When the machine is in operation and the timber is fed down the feed-table D between the rollers E and F, then the said timber is held against upward movement by the action of the rollers rotating in the directions described to insure a positive feeding and holding of the timber against the face of the chipper-head, so that the knives thereof cut chips of a uniform thickness at all times. Furthermore, the action of the rollers E and F on the timber holds the latter in such firm position that it is not liable to vibrate during the time the knife on the chipper-head cuts the chips off the timber. As the chipper-head usually makes about four hundred revolutions per minute, it is evident that the positive feed of the timber by the rollers E and F is essential to the proper workings of the machine, especially as the said rollers are positively driven and rotate in unison with the revolving chipper-head.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a feed attachment for wood-pulp chippers, the combination with a rotarycutter, an inclined feed-table having an opening-in its bottom, a lower feed-roller below the table an d operated from the cutter-shaft, said roller projecting into the opening of the feed-table, of a shaft in rear of the feedroller shaft and geared therewith, arms mounted loosely on said shaft, an upper feed-roller mounted in the free ends of the arms and adapted to engage the upper surface of the timber, and means for operating said upper feed-roller from the shaft upon'which its arms are mounted, substantially as described.

2. In a feed attachment for wood-pulp chippers, the combination with a rotary cutter, and an inclined table having an opening in its bottom, of a shaft below the table and provided with a gear-wheel, a feed-roller mounted on the shaft andprojectinginto the opening of the table, means for operating the feedroller shaft from the cutter-shaft, a shaft in rear of the feed-roller shaft and provided with a gear-wheel meshing with the gear-wheel thereof, arms mounted loosely on the said shaft, an upper feed-roller mounted in the free ends of the said arms, and means for operating the upper roller from the said shaft, substantially as described.

3. In a feed attachment for wood-pulp chippers, the combination with a rotary cutter, an inclined feed-table having an opening in its bottom, a shaft below the feed-table and provided with a gear-wheel, a lower feed-wheel on the shaft and projecting into the opening of the feed-table, and means for operating the shaft of the feed-roller from the cutter-shaft, of a shaft in rear of the shaft of the said roller and provided with a gear-wheel meshing with the gear-wheel of the feed-roller shaft, arms loosely fulcrumed on the said shaft, an upper roller mounted in the free ends of the arms, a sprocket-Wheel on the shaft of the said upper roller, asprocket-Wheel on the shaft upon which the arms are mounted, and a sprocketchain passing around said wheels, substantially as described.

SAMUEL NV. BUTTERFIELD. Witnesses:

THEo. G. Hosrrnn, J NO. M. BITTER. 

